#ifndef __M_BROKER_H__
#define __M_BROKER_H__
#include "muduo/proto/codec.h"
#include "muduo/proto/dispatcher.h"
#include "muduo/base/Logging.h"
#include "muduo/base/Mutex.h"
#include "muduo/net/EventLoop.h"
#include "muduo/net/TcpServer.h"
#include "../mqcommon/mq_threadpool.hpp"
#include "../mqcommon/mq_msg.pb.h"
#include "../mqcommon/mq_proto.pb.h"
#include "../mqcommon/mq_logger.hpp"
#include "mq_connection.hpp"
#include "mq_consumer.hpp"
#include "mq_host.hpp"

namespace zymq
{
    #define DBFILE "/meta.db"
    #define HOSTNAME "MyVirtualHost"
    class Server
    {
    public:
        typedef std::shared_ptr<google::protobuf::Message> MessagePtr;

        Server(int port, const std::string &parentdir)
            : _server(&_baseloop, muduo::net::InetAddress("0.0.0.0", port),"Server", muduo::net::TcpServer::kNoReusePort),
              _dispatcher(std::bind(&Server::onUnknownMessage, this, std::placeholders::_1,std::placeholders::_2, std::placeholders::_3)),
              _codec(std::make_shared<ProtobufCodec>(std::bind(&ProtobufDispatcher::onProtobufMessage, &_dispatcher,std::placeholders::_1, std::placeholders::_2, std::placeholders::_3))),
              _virtual_host(std::make_shared<VirtualHost>(HOSTNAME, parentdir, parentdir + DBFILE)),
              _consumer_manager(std::make_shared<ConsumerManager>()),
              _connection_manager(std::make_shared<ConnectionManager>()),
              _threadpool(std::make_shared<threadpool>())
        {
            // 针对历史消息中的所有队列，别忘了初始化队列的消费者管理结构
            QueueMap qm = _virtual_host->allQueues();
            for(auto & q : qm)
            {
                _consumer_manager->initQueueConsumer(q.first);
            }

            // 注册业务请求处理函数
            _dispatcher.registerMessageCallback<zymq::openChannelRequest>(std::bind(&Server::onOpenChannel, this,
                       std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
            _dispatcher.registerMessageCallback<zymq::closeChannelRequest>(std::bind(&Server::onCloseChannel, this,
                       std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));

            _dispatcher.registerMessageCallback<zymq::declareExchangeRequest>(std::bind(&Server::onDeclareExchange, this,
                       std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
            _dispatcher.registerMessageCallback<zymq::deleteExchangeRequest>(std::bind(&Server::onDeleteExchange, this,
                       std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));

            _dispatcher.registerMessageCallback<zymq::declareQueueRequest>(std::bind(&Server::onDeclareQueue, this,
                       std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
            _dispatcher.registerMessageCallback<zymq::deleteQueueRequest>(std::bind(&Server::onDeleteQueue, this,
                       std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));

            _dispatcher.registerMessageCallback<zymq::queueBindRequest>(std::bind(&Server::onQueueBind, this,
                       std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
            _dispatcher.registerMessageCallback<zymq::queueUnBindRequest>(std::bind(&Server::onQueueUnBind, this,
                       std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));

            _dispatcher.registerMessageCallback<zymq::basicPublishRequest>(std::bind(&Server::onBasicPublish, this,
                       std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
            _dispatcher.registerMessageCallback<zymq::basicAckRequest>(std::bind(&Server::onBasicAck, this,
                       std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
            _dispatcher.registerMessageCallback<zymq::basicConsumeRequest>(std::bind(&Server::onBasicConsume, this,
                       std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
            _dispatcher.registerMessageCallback<zymq::basicCancelRequest>(std::bind(&Server::onBasicCancel, this,
                       std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));

            

            _server.setMessageCallback(std::bind(&ProtobufCodec::onMessage, _codec.get(),
                        std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));

            _server.setConnectionCallback(std::bind(&Server::onConnection, this, std::placeholders::_1));
        }

        void start()
        {
            _server.start();
            _baseloop.loop();
        }

    private:
        // 打开/关闭信道
        void onOpenChannel(const muduo::net::TcpConnectionPtr &conn, const openChannelRequestPtr &message, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if(mconn.get() == nullptr)
            {
                DLOG("打开信道时, 没有找到连接对应的connection对象");
                conn->shutdown();
                return ;
            }
            mconn->openChannel(message);
        }
        void onCloseChannel(const muduo::net::TcpConnectionPtr &conn, const closeChannelRequestPtr &message, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if(mconn.get() == nullptr)
            {
                DLOG("关闭信道时, 没有找到连接对应的connection对象");
                conn->shutdown();
                return ;
            }
            mconn->closeChannel(message);
        }
        // 声明/删除交换机
        void onDeclareExchange(const muduo::net::TcpConnectionPtr &conn, const declareExchangeRequestPtr &message, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if(mconn.get() == nullptr)
            {
                DLOG("声明交换机时, 没有找到连接对应的connection对象");
                conn->shutdown();
                return ;
            }

            Channel::ptr cp = mconn->getChannel(message->cid());
            if(cp.get() == nullptr)
            {
                DLOG("声明交换机时, 没有找到信道");
                return ;
            }
            return cp->declareExchange(message);
        }
        void onDeleteExchange(const muduo::net::TcpConnectionPtr &conn, const deleteExchangeRequestPtr &message, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if(mconn.get() == nullptr)
            {
                DLOG("删除交换机时, 没有找到连接对应的connection对象");
                conn->shutdown();
                return ;
            }

            Channel::ptr cp = mconn->getChannel(message->cid());
            if(cp.get() == nullptr)
            {
                DLOG("删除交换机时, 没有找到信道");
                return ;
            }
            return cp->deleteExchange(message);
        }
        // 声明/删除队列
        void onDeclareQueue(const muduo::net::TcpConnectionPtr &conn, const declareQueueRequestPtr &message, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if(mconn.get() == nullptr)
            {
                DLOG("声明队列时, 没有找到连接对应的connection对象");
                conn->shutdown();
                return ;
            }

            Channel::ptr cp = mconn->getChannel(message->cid());
            if(cp.get() == nullptr)
            {
                DLOG("声明队列时, 没有找到信道");
                return ;
            }
            return cp->declareQueue(message);
        }
        void onDeleteQueue(const muduo::net::TcpConnectionPtr &conn, const deleteQueueRequestPtr &message, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if(mconn.get() == nullptr)
            {
                DLOG("删除队列时, 没有找到连接对应的connection对象");
                conn->shutdown();
                return ;
            }

            Channel::ptr cp = mconn->getChannel(message->cid());
            if(cp.get() == nullptr)
            {
                DLOG("删除队列时, 没有找到信道");
                return ;
            }
            return cp->deleteQueue(message);
        }
        // 队列绑定/解绑
        void onQueueBind(const muduo::net::TcpConnectionPtr &conn, const queueBindRequestPtr &message, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if(mconn.get() == nullptr)
            {
                DLOG("队列绑定时, 没有找到连接对应的connection对象");
                conn->shutdown();
                return ;
            }

            Channel::ptr cp = mconn->getChannel(message->cid());
            if(cp.get() == nullptr)
            {
                DLOG("队列绑定时, 没有找到信道");
                return ;
            }
            return cp->queueBind(message);
        }
        void onQueueUnBind(const muduo::net::TcpConnectionPtr &conn, const queueUnBindRequestPtr &message, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if(mconn.get() == nullptr)
            {
                DLOG("队列解绑时, 没有找到连接对应的connection对象");
                conn->shutdown();
                return ;
            }

            Channel::ptr cp = mconn->getChannel(message->cid());
            if(cp.get() == nullptr)
            {
                DLOG("队列解绑时, 没有找到信道");
                return ;
            }
            return cp->queueUnBind(message);
        }
        // 消息发布/确认
        void onBasicPublish(const muduo::net::TcpConnectionPtr &conn, const basicPublishRequestPtr &message, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if(mconn.get() == nullptr)
            {
                DLOG("消息发布时, 没有找到连接对应的connection对象");
                conn->shutdown();
                return ;
            }

            Channel::ptr cp = mconn->getChannel(message->cid());
            if(cp.get() == nullptr)
            {
                DLOG("消息发布时, 没有找到信道");
                return ;
            }
            return cp->basicPublish(message);
        }
        void onBasicAck(const muduo::net::TcpConnectionPtr &conn, const basicAckRequestPtr &message, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if(mconn.get() == nullptr)
            {
                DLOG("消息确认时, 没有找到连接对应的connection对象");
                conn->shutdown();
                return ;
            }

            Channel::ptr cp = mconn->getChannel(message->cid());
            if(cp.get() == nullptr)
            {
                DLOG("消息确认时, 没有找到信道");
                return ;
            }
            return cp->basicAck(message);
        }
        // 队列消息订阅
        void onBasicConsume(const muduo::net::TcpConnectionPtr &conn, const basicConsumeRequestPtr &message, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if(mconn.get() == nullptr)
            {
                DLOG("队列消息订阅时, 没有找到连接对应的connection对象");
                conn->shutdown();
                return ;
            }

            Channel::ptr cp = mconn->getChannel(message->cid());
            if(cp.get() == nullptr)
            {
                DLOG("队列消息订阅时, 没有找到信道");
                return ;
            }
            return cp->basicConsume(message);
        }
        // 队列消息取消订阅
        void onBasicCancel(const muduo::net::TcpConnectionPtr &conn, const basicCancelRequestPtr &message, muduo::Timestamp)
        {
            Connection::ptr mconn = _connection_manager->getConnection(conn);
            if(mconn.get() == nullptr)
            {
                DLOG("队列消息取消订阅时, 没有找到连接对应的connection对象");
                conn->shutdown();
                return ;
            }

            Channel::ptr cp = mconn->getChannel(message->cid());
            if(cp.get() == nullptr)
            {
                DLOG("队列消息取消订阅时, 没有找到信道");
                return ;
            }
            return cp->basicCancel(message);
        }

        void onConnection(const muduo::net::TcpConnectionPtr &conn)
        {
            // 当有一个新连接到来时，连接内的信道（即消费者）需要修改_consumer_manager，_virtual_host
            if (conn->connected()){
                _connection_manager->newConnection(conn, _codec, _consumer_manager, _virtual_host, _threadpool);
            } else {
                _connection_manager->delConnection(conn);
            }
        }
        void onUnknownMessage(const muduo::net::TcpConnectionPtr &conn, const MessagePtr &message, muduo::Timestamp)
        {
            LOG_INFO << "onUnknownMessage: " << message->GetTypeName();
            conn->shutdown();
        }

    private:
        muduo::net::EventLoop _baseloop;
        muduo::net::TcpServer _server;     // 服务器对象
        ProtobufDispatcher _dispatcher;    // 请求分发器对象--要向其中注册请求处理函数
        ProtobufCodecPtr _codec;           // 协议处理器--针对收到的请求数据进行protobuf协议处理

        VirtualHost::ptr _virtual_host;
        ConsumerManager::ptr _consumer_manager;
        ConnectionManager::ptr _connection_manager;
        threadpool::ptr _threadpool;
    };
}

#endif